/* Declarations for getopt.
   Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc.

   This file is part of the GNU C Library.  Its master source is NOT part of
   the C library, however.  The master source lives in /gd/gnu/lib.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _PVPGN_GETOPT_H_
#define _PVPGN_GETOPT_H_ 1

#include "common/setup_before.h"

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifndef HAVE_GETOPT

namespace pvpgn
{

	/* For communication from `getopt' to the caller.
	   When `getopt' finds an option that takes an argument,
	   the argument value is returned here.
	   Also, when `ordering' is RETURN_IN_ORDER,
	   each non-option ARGV-element is returned here.  */

	extern char *optarg;

	/* Index in ARGV of the next element to be scanned.
	   This is used for communication to and from the caller
	   and for communication between successive calls to `getopt'.

	   On entry to `getopt', zero means this is the first call; initialize.

	   When `getopt' returns -1, this is the index of the first of the
	   non-option elements that the caller should itself scan.

	   Otherwise, `optind' communicates from one call to the next
	   how much of ARGV has been scanned so far.  */

	extern int optind;

	/* Callers store zero here to inhibit the error message `getopt' prints
	   for unrecognized options.  */

	extern int opterr;

	/* Set to an option character which was unrecognized.  */

	extern int optopt;

	/* Describe the long-named options requested by the application.
	   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
	   of `struct option' terminated by an element containing a name which is
	   zero.

	   The field `has_arg' is:
	   no_argument		(or 0) if the option does not take an argument,
	   required_argument	(or 1) if the option requires an argument,
	   optional_argument 	(or 2) if the option takes an optional argument.

	   If the field `flag' is not NULL, it points to a variable that is set
	   to the value given in the field `val' when the option is found, but
	   left unchanged if the option is not found.

	   To have a long-named option do something other than set an `int' to
	   a compiled-in constant, such as set a value from `optarg', set the
	   option's `flag' field to zero and its `val' field to a nonzero
	   value (the equivalent single-letter option character, if there is
	   one).  For long options that have a zero `flag' field, `getopt'
	   returns the contents of the `val' field.  */

	struct option
	{
		const char *name;

		/* has_arg can't be an enum because some compilers complain about
		   type mismatches in all the code that assumes it is an int.  */
		int has_arg;
		int *flag;
		int val;
	};

	/* Names for the values of the `has_arg' field of `struct option'.  */

#define	no_argument		0
#define required_argument	1
#define optional_argument	2

	extern int getopt(int argc, char *const *argv, const char *shortopts);

}

#endif /* !HAVE_GETOPT */

#endif /* _PVPGN_GETOPT_H_ */
